Port Load Test

Assess the load on every enabled port on the storage device using this test.

Target of the test : A Hitachi AMS storage device

Agent deploying the test : A remote agent

Outputs of the test : One set of results for every port on the storage device monitored.

Configurable parameters for the test
Parameter	Description
Test Period	How often should the test be executed.
Host	The IP address of the storage device.
UnitName	Specify the name of the storage unit to be monitored. To determine the unit name registered with the Storage Navigator Client for the AMS SAN device, run the following commands, one after another, from the C:\Program Files\Storage Navigator Modular CLI directory on the Storage Navigator Client: startnsmen auunitref The output of the command includes the Name of the storage unit. DF700M_75011118 is a sample unit name.
MCType	Indicate the machine type. The value can be AMS or WMS. By default, this parameter is set to AMS.
SNClientLocation	Specify the full path to the install directory of the storage navigator.
Timeout	Indicate the duration (in minutes) for which this test should wait for a response from the storage device. By default, this is set to 5 minutes.

Measurements made by the test
Measurement	Description	Measurement Unit	Interpretation
IO rate	Indicates the number of I/O operations performed on this port per second.	IOPS	If this measure reports a high value or if the value of the measure increases consistently, it is indicative of unusually high I/O activity on this port. Comparing the value of this measure across ports can accurately indicate which port is currently experiencing heavy workloads. Observing the variations in this measure over a period of time will enable you to figure out bottlenecks in load balancing.
Read rate	Indicates the number of read operations performed on this port per second.	IOPS
Write rate	Indicates the number of write commands issued on this port per second.	IOPS
Read hit	Indicates the percentage of read requests that were served from the cache.	Percent	Ideally, the value of this measure should be high. A low value is a cause for concern, as it indicates that a majority of the read requests have been serviced by direct disk accesses, which in turn would increase the processing overheads.
Write hit	Indicates the percentage of write requests that were served from the cache.	Percent	Ideally, the value of this measure should be high. A low value is a cause for concern, as it indicates that a majority of the write requests have been serviced by direct disk accesses, which in turn would increase the processing overheads.
Data transfer rate	Indicates the transfer size of read/write commands per second.	KB/sec
Read transfer rate	Indicates the transfer size of read commands per second.	KB/sec
Write transfer rate	Indicates the transfer size of write commands per second.	KB/sec